with some modification. An amount of 300 mg of products was transferred into 1.5 mL sterile vials with addition of 1000 lL CTAB extraction buffer (0.1 M Tris–HCl, 20 g/L CTAB (Promega, Madison, WI, USA), 1.4 M NaCl, 20 mM EDTA, and pH 8.0) and 0.02 ml of proteinase K (20 mg/ml) was added to the mixture.